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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0acf273aef70bfbe0547a2812b4545022dcc7fe28ef9e95b8a260f02f16cd6a' 
  AND token = 'vy3xv9Y8La74uKBbnWUtpJg2o0361YmaT02htlL9DgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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