Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'd3298d4b04285ae78df75350db026e9b17937a2d1e00e26f31d578d26b14d76e' 
  AND token = 't31QA5Bju9j8eY3mR5fX0oi4zbYM/8/OlncctgFOuFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}