Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deec4bf628ff07ecfc1e637177cc784550556fa4e3bd87881b9fa8648e27629b' 
  AND token = 'vLB0fagh520C8nH9AednbHxVIEe2MNPGDTwVOwRp2fM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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