Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee0776f0f5644a77b7f30a3b1f80d9284695376b0bb7bfdfadbe4409a09205c1' 
  AND token = 'sQyagbuiLHWV26yReX/VX2cCQmdm9082VL4DSEA1EpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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