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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1c1a0befe93cfd06cc8c466039db502b093b328a058ad43c827450de37912ca' 
  AND token = 'zqgcI5QqhcOL9HtQEFC02pt9lVgH5XTCvpitWo0M48I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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