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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82a5ee5f4d1df1189b89cf0ad58916a4b41e22bd109b555a86feff966104502' 
  AND token = 'v2Y53vDkK/K6pRKL02yYepH/YRT7NwwoY/9RRH4bNgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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