Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0a5960ea8efba199263c4032f8e045528cbc435fe93ea7efca10c33b0c9b577' 
  AND token = '+VDbiQ49gAfdpKlnhZ5iwhheSjaF9Fj6GD+q1MmLmJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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