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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '81b4de95c7a8fe6247cc9dd792c01be3eac5e125b3f17a366c93f557f1051e86' 
  AND token = 'uzTU55sF2nNyT86ZFr0Hb7lsBKHkGiR+eozDMcaJZ+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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