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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c7e9091d46fe0b67e3dbcf067aeef0cb5c28867898269e9eefebe1b11622647f' 
  AND token = 'fz3ooEUkjtomnFf1R8fvebIM6bBv1s2+VAuiEUuvRC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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