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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89bd5deb13b46814d2d87ef96e4e596062e20d2e94494e786e1d9511065ff039' 
  AND token = 'TzpJfe50OtjbF8WBMDLN4IIjj/6jdKvAzBO0X7a91KI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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