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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '88991194b6874b074f03040f1bbc9b7e0e851790824959ec81ef6e0b2627181d' 
  AND token = 'TgkvyjfzQFeXJ8pPOTMJR9y5eFgQqYRYPdFSY19hw60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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