Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eed2523e2e66eff50c195d2013555f3af63d17758b85cdb1245fbf23fbe8adc1' 
  AND token = 'VxFSX/ccmddFO+y9GV9pXsN4ooBJyR0JPJ+khM94MJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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