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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130b972ec6d4f8dc2f7b848abafe72741f0c315f1b2610998a6c9d64fed6cb7a' 
  AND token = 'gwg0Af38Aygt5o9xUGOvNpHVdpeFh2x9OnCO0T22YkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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