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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ee91024fe9b8bc99a6746d18a37e46af63d1cd2414eb1d1ce2a8e4c2254eb2ed' 
  AND token = 'aoXAu1iyuTm5EyTIu3Vk5l0U8yj2VLhKCRhjCazH/G0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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