SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5216befa7498318ef3082492857fe7359bf64ac6c6391d0514ae7e8e541213e3' 
  AND token = 'MoUg0x/RX1R5ls8V7IAFx9LZudO4lz+GAGV8P4yr7Y0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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