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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '067d8645f0dc96261551d4791138f5ab8441384ca4fc84d4ac81aa9688e66af1' 
  AND token = '8NUBkX+fgu28loh7QDkPrVOtMqEJ5zEW7Vb5rKlNeKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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