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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '655b84877c444f153d03bf3145c24f7f2fd852583a7c1d4b09938dc7140a85c4' 
  AND token = 'yIac4yK2cqpzsOY8JL3rdjXI8tjn2MbsN/2uMLWv98Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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