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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee4b0569b2d9167c044f108861a5f228cf6489aca540242f0bb1199ef639132d' 
  AND token = 'iFL28UXLlvNJ0K4njfDh6jX/3h0F3RQw0kB3de6oFKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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