Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ecdda731db15663f459b065f2262cb0e004016f759e3fc7e56642a80e01c671' 
  AND token = 'AAAGZkCRNHX0En3M/79++wWTTFYP7MBtXAOEsnQ5k2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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