SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b19ee7efdb2e349dee6a6538da44ffd1990fb06626ac8965f7d68d6e59f05b40' 
  AND token = 'QSlUShqd2FSFRpHcIWMFnkKmnsqWjBuafJH01MwXKCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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