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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72524652e0918abb333f4042802b11b163a4f0cc37bd96b9cabc2d65d35d110d' 
  AND token = 'YQNbxzDmzQq+ie8loCsP7zknaQ8YWguia2eHRQlSsxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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