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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e484574572a2db5c637ad2933c674e190c21f37ade06569d8d1cb6473c2e87b' 
  AND token = 'BGK/oOWgk7SbKGXwn5BG494PrtADEnoFbTxFaOJheGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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