Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98f5d89c8916d5195ff9a9310c981b6c04b194bc1dc8dcdecb78d16ea56ec275' 
  AND token = 'fZvFPiwmRtGiM2RbrMqp9VMb7kH2z1O+MXakjPlabO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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