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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32a9ff8ff30676b9b013432258fd0c1c8480fe76164c493730b7a81c1583ef70' 
  AND token = 'M4nrkxKbowd5Whkpvso7yTuVs78d6+Ff38uin8bDvhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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