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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '053dfa11f0c700a9c20ab9884b58546f26ffd434bf03795dbdcdafd5526c6ae1' 
  AND token = 'A5dCI/gLVfGNkpCaYw8TzasDQ5xvDHYfJtM3IfzD/es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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