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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b80016c458be8e9b3639f5e89ee000f19a80d9daf36b35a9b01c56e58fce1929' 
  AND token = 'izVehvdrKxV+iqF26VFD8OatLm56xNWU/4mvLqSrbh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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