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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bab2d778a37c65f6d6238b9ef0f4c05f0554b7bc08ccf5002d0646d4cef9ac63' 
  AND token = 'NcoY6uC9blBH11igk3QUrc+C/ddO0xa/erwI5EW54z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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