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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bedf3803278d136e7def5e9cc9cb0e45027e9ed958e0dfcba62a3a3e6342a6b' 
  AND token = 'ENOBtA0HoRI1jIKRKw74qCbZcoRhqj/Ka4Ws7IxnZgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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