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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69b060c93b2fd9bcaa2e48bc1655f392039ec3d2f26e9fdf1c34f69c112c0241' 
  AND token = '1JYrdV8irtmOje+LNGzCVVbrkqnsYpCj7UTFSNYcHD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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