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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b74cff7fc64a6b1118312737c4ad60a7f066e97e08b4c525af7a642ab4ee9745' 
  AND token = 'tBDvKVRwZTP7dFCUizfS6O1sM1yVRiSdd4ZUP27h53s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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