Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6c10334cb98a0db80382eba726061608c1bb5efe3abd0fe1c51f8b8df58dac1' 
  AND token = 'tBHtrvBFRbn6CUiLma0zh8TsZyj85WgvPQg3nm9Rerk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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