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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '05fbc9f4f43d3dc207193fa9a6cf676988d3290fd839e0ba59e9ac3aee57d3cf' 
  AND token = 'yac5MmH9B2yN6qW1zwVYHeiDxxksbtxJo9kV2CTq34s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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