SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9032066caf3a146fefe2a5149567468dddbeb7ba53cbc1b2ac9493d5191bf72a' 
  AND token = '0BxXw+LJhQ+N8T+diXOYzS4rPpDWalJ4pk8Gr7yKZEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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