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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c9ffa155bf4c2cb6651af880436f39eb999fcefee95040f0e80c2d53bec9f44e' 
  AND token = 'LAzSza1mPnVlx1DYggBODda5K1+E4xXla1/8isuparo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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