SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f80ce599cfc1f56c0981584bcbc8f0dd7c05bedc0147bad152c4e142ea3b5876' 
  AND token = 'PoFwkPeOOU3rCirzP+t/HB6pAa9BQjf+J/n8qX/VYic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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