Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e84282cfcf2e25b25019f03c4ce854410d4c868d1c1146ec14dd52d93ffebacf' 
  AND token = 'TeshYDh5x3I3EmCtEck1Z61WMOS0YNiqDTJ+VxMBlNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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