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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67c40869262a589b307fedc5aa18b333127d2590b684174e1621570c43f8d518' 
  AND token = '3yGHmz6d0+NzyLwMdX38vEh8RHVMDFF5vHNDJabAIF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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