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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '565ea99ec15a307c55cf27544f62b6547440bf4606c41589a64873d6504a0233' 
  AND token = 'X1ASycAcc6ZhiITjPxVwHUSSI8wS3VW0K38ZMMfF7ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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