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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66cf1e7c4530aa54e5c54af0a51e3f8bb124fbf7a5efe29fe9ae84bc0fefeeed' 
  AND token = 'w32+EPP0ZAUMB52NmgN+jweJ8ROoKHsm7yK9c+dpajs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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