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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e311146bde9ef723e59f286700bdaf0c48ceb3ae695551113450a6462d097c9e' 
  AND token = 'ffGfrClknGI7lqFO/l68U4GI/W3gIMN9nWclV0KgtgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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