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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcd90c16a85b2bc2b41031214c80601d2560c6494fa0a8ea31dcd5ef85cbfc58' 
  AND token = 'MxiIwFFS8h7IJR29329nwmOSk5EDNCXWgGWVDMhDTs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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