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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd34fa9830c61f05124c9ac0493528a697fefd7b577e0e1d3117085b28f1b5bc0' 
  AND token = 'rwEQnbfPhJSMc5Jeyeec9o2onFwp1molD8OsneQLOus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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