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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0dc0fb44f0ea97bb24dbd9d264d123b377e177fac991de0ae7823d043be028d0' 
  AND token = 'RZiDGrgjVh3rjAkj3tC9ji+tL5TDeASAog2C9DKDdQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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