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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8a57bf9ea4f002198b6e3f9dcd52a97097758680781a01fce2ce7cd6d5fc114' 
  AND token = 'xa44ufNjMpE0jpMgfUI/g+0rOWTQLJ3KgBibY14xKrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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