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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7aa96b0b8ab8504a1279813c3bf75a3fd3c6dadbdcd87dee0dee3eb0c6cc4445' 
  AND token = '7WAUfUd48YvIv6dgJaIwgOXNygJmpOg14ck9f1SmAcE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}