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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0071083307fda14e6e182485d0c1e1cac81f302cd72c9827aa13d0dd045cac22' 
  AND token = 'ToBk++Bn40Ru7DLZvpjAYTuGSjooWjQOQn9x4LQq99Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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