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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'dab2b44733d39cba1eb2c1e20cab03dba9a8f62a3a767a2e711f6d1e534e6227' 
  AND token = 'FBd4V7LamswAGxq0Xh40M7tqSgZSawng31EPdBqb6fI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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