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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25774880d809b6371790ee38f0fa1d3b5cf612f690a854f9f75e011d883de03b' 
  AND token = 'waMbfxpyPBkg4hX29He5SjjiaIohrLBTsQ1igPeB9Fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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