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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8afaeaeb1f9ceaa648aa83aa6191374a62a7417df9cfd68549c4e9a4fd2e76f' 
  AND token = '8Wj5dP60hOKEMkEyfhgKuOXaBMYo5PGxPm4mUdpUHn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}