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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ca4e01f23f1e22aca50b753c22cc70b41c17473d878fb05235fa0d667343855' 
  AND token = 'ZqbogfE0bWXoV4llriyYZdeHBgbG7eYID0OLlR4ote4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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