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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd37d14505e20a2c98e6d17e3309e4992d138ff1557a6ae9ffbd4ffb0e402c9fe' 
  AND token = 'NYFfaYY2NLFgvUtHHM/W0muUckvdYvo2LoLg726zoBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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