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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d2083345b44a3eae2c322e0f23478f051ab5f95aca1d2b43a347f5ae824babb' 
  AND token = 'Y6aGNHpYAxAVWZan1f9lqp88g5+97XNDRiUaP0V8YBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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