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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '222e1d7439be083e05d7ae8a9cf03fcfc810657d8f1a1ebd6902422df704acde' 
  AND token = 'QiFN1Ab32/dXLn2oG01jbH7zTYiWhB75p7dPDAZIbM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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