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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0530fd1fc2185107e5fd4293646d8bd32a3738dc86e1c0010e9b5fb224c39bd5' 
  AND token = 'sIP00nPumMzEGxQwCC8XTmj5vojtH8ZvKrDGE8SyO9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}