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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14e5734598c53e90f3039b4ca8d99c19b7b3cf5a89a002dff1d5d2d5aeab78b7' 
  AND token = 'Y6ady2nHDxH9oR0a4mOV40e/Q4enp1K7jbkJg73Scvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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