SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'afb7109644cb75684d6930ec48683eb99cc9196a2e37dedfd359b5f72da22e87' 
  AND token = 'Lmf8t5DZSy1u/Vn1mv2hyighkuQ3SjD4m/pya7lzQzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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