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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a48912b3ffa03433ea73c96b8ff9f8b4d7af33beeccf236c00c38bccdaf733ed' 
  AND token = 'jnrTwnwQbYFsTAjT4Tczeq0EbGX1lnppCtukSA8mEsM=' 
  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"
    }
  }
}