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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01f877172ceea2a67f8283cb139c9e21ca64487a98b9e19f9d319ffd1d499523' 
  AND token = 'OYjsgsDVpvK43hiv0KxeFlavfH39C5RR4TT9b6lTtYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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